GB1102968A - Magnetic composition and recording medium - Google Patents

Magnetic composition and recording medium

Info

Publication number
GB1102968A
GB1102968A GB5139765A GB5139765A GB1102968A GB 1102968 A GB1102968 A GB 1102968A GB 5139765 A GB5139765 A GB 5139765A GB 5139765 A GB5139765 A GB 5139765A GB 1102968 A GB1102968 A GB 1102968A
Authority
GB
United Kingdom
Prior art keywords
magnetic
magnetic material
stearyl
dec
carbon atoms
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5139765A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Publication of GB1102968A publication Critical patent/GB1102968A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/702—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the bonding agent
    • G11B5/7023—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the bonding agent containing polyesters, polyethers, silicones, polyvinyl resins, polyacrylresins or epoxy resins
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/71—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the lubricant

Landscapes

  • Magnetic Record Carriers (AREA)
  • Paints Or Removers (AREA)

Abstract

1,102,968. Magnetic compositions. SONY CORPORATION. 3 Dec., 1965 [5 Dec.. 1964], No. 51397/65. Heading HlH. A magnetic composition comprises powdered magnetic material and a binder together with 0À5-20 parts by weight per 100 parts magnetic material of one or more fatty acid esters produced from a monohydroxy alcohol having at least 14 carbon atoms and one or more monobasic fatty acids having 2-18 carbon atoms. The acid may be saturated, or have a degree of unsaturation up to an iodine value of 10. Esters exemplified are stearyl butyrate, stearyl stearate, stearyl laurate, and tetradecyl caprilate. The composition may be dispersed in a solvent, e.g. toluene or methyl ethyl ketone, and coated on a base, e.g. a polyester film, to form magnetic recording tape, e.g. 10Á thick. The magnetic material may be acicular y-Fe 2 O 3 or an alloy of 30-70% Fe, 40-80% Co and 0-20% Ni by weight. The binder may be P.V.C., polyvinyl acetate, polybutyl acrylate, or copolymers thereof, polyurethane, epoxy resin, or mixtures thereof. Plasticizers, e.g. dioctyl phthalate or cebatate may be included.
GB5139765A 1964-12-05 1965-12-03 Magnetic composition and recording medium Expired GB1102968A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6838864 1964-12-05

Publications (1)

Publication Number Publication Date
GB1102968A true GB1102968A (en) 1968-02-14

Family

ID=13372271

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5139765A Expired GB1102968A (en) 1964-12-05 1965-12-03 Magnetic composition and recording medium

Country Status (2)

Country Link
FR (1) FR1457106A (en)
GB (1) GB1102968A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4172176A (en) * 1977-06-01 1979-10-23 Sony Corporation Magnetic recording medium
US4340644A (en) * 1978-11-24 1982-07-20 Tdk Electronics Co., Ltd. Magnetic recording medium
US4388376A (en) * 1979-06-25 1983-06-14 Tdk Electronics Co., Ltd. Magnetic recording medium
US4562019A (en) * 1979-02-23 1985-12-31 Inoue-Japax Research Incorporated Method of preparing plastomeric magnetic objects

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4172176A (en) * 1977-06-01 1979-10-23 Sony Corporation Magnetic recording medium
US4340644A (en) * 1978-11-24 1982-07-20 Tdk Electronics Co., Ltd. Magnetic recording medium
US4562019A (en) * 1979-02-23 1985-12-31 Inoue-Japax Research Incorporated Method of preparing plastomeric magnetic objects
US4388376A (en) * 1979-06-25 1983-06-14 Tdk Electronics Co., Ltd. Magnetic recording medium

Also Published As

Publication number Publication date
FR1457106A (en) 1966-10-28

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